EPM 2187-2190, (PART A) - COMBINED SIX MONTHLY REPORT FOR PERIOD ENDING 20/9/1980, (PART B) - 1ST PROGRESS REPORT ON PHOSPHATE BENEFICIATION, (PART C) - 2ND PROGRESS REPORT ON PHOSPHATE BENEFICIATION, (PART D) - COLLECTED REPORTS BY DAMPIER MINING LTD